Research on the MEMS Gyroscope Random Drift Error
Xunsheng Ji, Shourong Wang · Journal of Astronautics · 2006
How to decrease the random drift noise is one of the ways to improve the performance of the MEMS gyroscope.In this paper,principle of the time-sequence analysis from the random series was analyzed.The original measurement from the MEMS gyroscope was firstly processed by the way of an average estimation.The residual signal,which was got from the fitted original signal,was modeled by the AR(1) model.After the residual signal was filtered by the Kalman filtering,the measuring accuracy was improved greatly.The main error source was detrained out by the Allan variance analyzing.The processed result from the measurement data showed that the bias stability was improved 4 times and the random walk coefficient was improved 7 times.